khaimraj welcome to Pak Bonsai.i have a tamarind plant,grew it from seed three years ago.i have planted it in training pot.regarding cold,in my region we get 0 temp when cold is on its best and 45 degree in summers.i have few trees grown from seeds.will share pics.

for what it is worth, we were in the same situation back in 1978 or so.We didn't have a Bonsai Society until around 1994 or so.Lots of experimenting.

A few suggestions.

Apart from what you may have in the plant nurseries, have you looked up your local trees / shrubs ?

Normally, there is a Herbarium somewhere in a University or other with a listing and files of dried leaves,flowers etc. of local trees / shrubs and roadside weeds.

You can try to source like this, look for trees or shrubs that have many branches and branchlets.

Or you can see if you have relatives of the elms [ ulmus ], pines [ pinus ], maples [ acer ], pomegranate [ punica ], hackberries [ celtis ], and so on. Just look up anything Japanese, European [ Olive - Olea or Russian Olive - Oleaster ], Chinese, whatever and see if you have a cousin in your country.

You may find it easier on your nerves to learn to grow trees outdoors, than indoors.Until.Khaimraj

When learning, it is more sensible to control the urge to collect old trees from the wild that have trunks larger than 2 cm.

Normally with inexperience you just end up killing the tree and you have nothing left. If you are patient and wait, learn all you can from the smaller specimen, it will be easier to take the bigger one.

Plus, you may find, that the tree is useless or only so so.

Or just grow a seed.Most you guys seem to be under 35 and so 5 years won't hurt you.Plus to learn about Bonsai it is normal to have 200 trees and slowly go down to 25 - 50 exceptional specimens.Khaimraj

From Seed - Olea Europeafrom 1986 or 85 need to check passport. Origin South Africa. Gift of 1/2 kilo of seed brought to Florence, Italy when I was a student.Not the best angle, just to show -